And as is the case with most breaking news, the best place to find instant commentary was not on Facebook. It was on Twitter, where some of Instagram's 30 million users expressed concern that the social network, which has long battled privacy concerns, would now have access to their uploaded Instagram photos.

"Uninstalling Instagram," Engadget co-founder Peter Rojas wrote in response to the news.

"Most of instagrammers I know are very anti- #instaface #facegram #facepalm," Jessica Plautzwrote.

Commenters took to posting on stories and on Twitter to highlight their fears of Facebook changing Instagram: